3645987748 has 72 divisors (see below), whose sum is σ = 7508094720. Its totient is φ = 1542602880.

The previous prime is 3645987727. The next prime is 3645987757. The reversal of 3645987748 is 8477895463.

It is a happy number.

3645987748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3645987748² = 26586453317132223008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393586 + ... + 402742.

Almost surely, 2^3645987748 is an apocalyptic number.

3645987748 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3645987748 is an abundant number, since it is smaller than the sum of its proper divisors (3862106972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3645987748 is a wasteful number, since it uses less digits than its factorization.

3645987748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9237 (or 9222 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 61.

The square root of 3645987748 is about 60382.0151038370. The cubic root of 3645987748 is about 1539.1173538836.

The spelling of 3645987748 in words is "three billion, six hundred forty-five million, nine hundred eighty-seven thousand, seven hundred forty-eight".